A relatively thin metallic item, having a concave or cupped contour, designed to effect its own seal by compression against the circumference of a hole. It is used as a blowout plug in boilers, engines, and the like to relieve the pressure created by the expansion of fluids caused by heat or freezing.
Classification: Parts for steam or other vapor generating boilers and super-heated water boilers, except heat exchangers
NSN 6650-01-426-4253
NSN 5905-01-112-0271
NSN 6650-00-009-9510
NSN 5920-00-271-3217
NSN 6220-01-232-1572
NSN 6650-00-197-7563
NSN 6620-01-640-6761
NSN 2925-01-228-4437
NSN 6110-01-321-3164
NSN 6685-00-922-6588
NSN 5935-00-104-5901
NSN 5975-00-592-8675